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ACRC Technical Report 164PDF


Title:Flow Diagnostics and the Acoustic Behavior of a Fan-and-Coil Assembly
Author(s):Zeller, S.E.; Weaver, R.L.; Dutton, J.C.; Jacobi, A.M.; Balachandar, S.
Subject(s):fan-and-coil assembly
Abstract:Project 84 concentrated on understanding the noise generating mechanisms of axial-flow fans with the intent of proposing methods of component design and system assembly by which noise generation is reduced or minimized. The project focused on the fan-coil unit typical to room air conditioners and many split-system applications. This report presents the accomplishments of the project, including the design, construction, and qualification of an anechoic chamber, the acquisition of acoustic, flow, and pressure data within a fan-coil unit over a typical operating range, and the development of an understanding of the flow-structure interactions responsible for noise generation in the fan-coil unit. This report focuses on the investigation of a method for measuring the dynamic axial force generated by a fan operating in a steady but spatially non-uniform flow field. Several variations of a measurement system that uses a cantilever beam were tested. Experimental results indicated, in all designs, that the measurement system introduced additional sources of axial motion, occurring at the frequencies of interest and at amplitudes much larger than the one to be measured. Recommendations for future work are given.
Issue Date:2000-04
Publisher:Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign.
Series/Report:Air Conditioning and Refrigeration Center TR-164
Genre:Technical Report
Sponsor:Air Conditioning and Refrigeration Project 84
Date Available in IDEALS:2009-05-26

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